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net: annotate accesses to sk->sk_rx_queue_mapping

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sk->sk_rx_queue_mapping can be modified locklessly,
add a couple of READ_ONCE()/WRITE_ONCE() to document this fact.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-10-25 09:48:20 -07:00 committed by Jakub Kicinski
parent 342159ee39
commit 09b8984667
1 changed files with 7 additions and 3 deletions
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10
include/net/sock.h
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@ -1925,15 +1925,19 @@ static inline void sk_rx_queue_set(struct sock *sk, const struct sk_buff *skb)
static inline void sk_rx_queue_clear(struct sock *sk) static inline void sk_rx_queue_clear(struct sock *sk)
{ {
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING #ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
sk->sk_rx_queue_mapping = NO_QUEUE_MAPPING; WRITE_ONCE(sk->sk_rx_queue_mapping, NO_QUEUE_MAPPING);
#endif #endif
} }
static inline int sk_rx_queue_get(const struct sock *sk) static inline int sk_rx_queue_get(const struct sock *sk)
{ {
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING #ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
if (sk && sk->sk_rx_queue_mapping != NO_QUEUE_MAPPING) if (sk) {
return sk->sk_rx_queue_mapping; int res = READ_ONCE(sk->sk_rx_queue_mapping);
if (res != NO_QUEUE_MAPPING)
return res;
}
#endif #endif
return -1; return -1;